[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <20150508095537.GA15394@opensource.wolfsonmicro.com>
Date: Fri, 8 May 2015 10:55:37 +0100
From: Nariman Poushin <nariman@...nsource.wolfsonmicro.com>
To: broonie@...nel.org
Cc: linux-kernel@...r.kernel.org, patches@...nsource.wolfsonmicro.com
Subject: [RFC][PATCH] regmap: make REGCACHE_NONE maps return error on
regcache_sync
Signed-off-by: Nariman Poushin <nariman@...nsource.wolfsonmicro.com>
---
regcache currently causes a BUG_ON if cache_sync/sync_region is
called on a map with cache_type REGCACHE_NONE. This is not
consistent with the behaviour of regcache_read/write which
currently just return -ENOSYS and only throws a BUG_ON if
the cache_type is something that _should_ have cache ops,
but doesn't. Sure your device might not work, it but doesn't
seem right to panic the kernel. The other option I suppose
is to change it to a WARN_ON.
Thanks
Nariman
drivers/base/regmap/regcache.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 7eb7b3b..992aba3 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -303,6 +303,9 @@ int regcache_sync(struct regmap *map)
const char *name;
unsigned int bypass;
+ if (map->cache_type == REGCACHE_NONE)
+ return -ENODEV;
+
BUG_ON(!map->cache_ops);
map->lock(map->lock_arg);
@@ -371,6 +374,9 @@ int regcache_sync_region(struct regmap *map, unsigned int min,
const char *name;
unsigned int bypass;
+ if (map->cache_type == REGCACHE_NONE)
+ return -ENODEV;
+
BUG_ON(!map->cache_ops);
map->lock(map->lock_arg);
--
2.1.4
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists